Yille



W. L. GLANVILLE.

ELECTRIC ALARM.

Patented Aug. 8, 1886.

(No Model.)

vv f? i M l 1 Li UNITED STATES PATENT Grinch,

WILLIAM L. GLANVILLE, OF AUBURN, NEW YORK.

ELECTREC IKLAREW SPECIFICATION forming part of Letters Patent No. 346,587, dated Align-i3, 1886.

Serial X0. 185,806. (X0 model.)

To aZZ whom it may concern:-

Be it known that I, WILLIAM L. GLAN- vILLE, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Electric Alarms; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this specification, and to the letters and figures of reference marked thereon.

The present invention has relation to that class of electric alarms or appliances for indicating the removal of any articles from the shelf or stand upon which they are supported. Previous to my invention there was in use such appliances employed for the purpose of indicating the removal of bottles or vessels containing poisonous substances, and consisted, essentially, of agalvanic battery and two insulated conductingwircs leading therefrom and passing close to each bottle or vessel; also an electric bell connected between the battery and the bottle nearest thereto. In order to provide means for sounding the alarm when a bottle containing the poison was removed, a connecting-piece was used which was held out of its normal circuit-completing position by means of a'lcver acted upon by the bottle when on its supporter stand. \Vhen a bottle was removcd,it ceased to act on the lever, the

conuectingpiece completed contact, and the bell sounded until the bottle was replaced.

It is the object of the present invention to dispense with the levers and like mechanism above described, and therefore consists in attaching the connecting-piece to the bottle or other article to be placed on the shelf or stand, and should the article he an electric conductor it will itself act as a connecting piece.

To provide some means to illustrate my invention I have shown the interior of a cabinet with a single shelf or support, A; but any arrangement of shelves and any number may be used, either in a cabinet or other place, as circumstances require, each shelf having electric conductors B, at convenient distances apart, and the bottles 0, provided with con ductors B a complete circuit will be closed or formed.

The poles of the battery are shown at E F, and G represents the magnet, and when the bottles or other articles are in position, as represented in drawing, and positive pole E at thebattery is connected, and the negative at F, the electric current would then follow the wire in the direction of the fullline arrows to b, thence up the conductor B of the shelf A, and through the conductor 1) on the bottle to next conductor B, and through next conductor D on the bottle to last conductor on the shelf, thence through the wire and through the magnet G to the screw on the left and rear foot of the relay H, thence through the metal of relay to bindingpost I, and through the wire back to negative pole F, thus forming a complete circuit, as indicated by the full-line arrows, and causing the core of the magnet to be magnetic and attract the armature J to the magnet G, and drawing the arm K from the point of the screw L.

Should one of the bottles 0 be removed from the shelf a, the circuit will be broken and the magnet lose its magnetism, which will cause the spring M to push the arm K, connected with the armature, back against the screw L, thus switching the current through the bell N. The current will now follow the direction of the broken-line arrows from the pole E down through the bell N to the screw I (which has a rubber covering) until it eating the removal of bottles or other articles In testimony that I claim the above I have from their shelves, an electric battery, Wires, hereunto subscribed my name in the presence 10 and bell, in combination with conductors conof two witnesses. nected to the shelves,and conductorsupon the 5 bottles or other articles resting upon the ,con- VILLIAM GLANVILLE' duetors on-the shelves and operating to break Vitnesses: V or connect the circuit, substantially as and for R031. F. YOUNG, the purpose set forth. CHAS. S. HARRIS. 

